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Subject[PATCH v3 08/14] habanalabs/gaudi: add a new IOCTL for NIC control operations
Date
From: Omer Shpigelman <oshpigelman@habana.ai>

Add Queue Pair (QP) opcodes to the NIC ioctl.

A QP represents a connection between two Gaudi ports. Each port currently
supports 1024 QPs where QP 0 is reserved for the driver for Ethernet.
User-space process needs to create a QP in order to communicate with other
Gaudis.

QP can have two contexts: requester (sender) and responder (receiver). Both
have unique parameters as well as shared ones.

The QP numbers are not recycled immediately but only after wraparound. This
to avoid cases where a QP was closed and reopened and got data of the
"old" QP.

The added opcodes are:

- Create a QP
- Set requester context
- Set responder context
- Destroy a QP

Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
drivers/misc/habanalabs/common/habanalabs.h | 3 +
.../misc/habanalabs/common/habanalabs_ioctl.c | 98 ++++-
drivers/misc/habanalabs/gaudi/gaudi.c | 1 +
drivers/misc/habanalabs/gaudi/gaudiP.h | 2 +
drivers/misc/habanalabs/gaudi/gaudi_nic.c | 406 ++++++++++++++++++
drivers/misc/habanalabs/goya/goya.c | 9 +
include/uapi/misc/habanalabs.h | 129 +++++-
7 files changed, 646 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index fee04299360d..cae6d1e26c36 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -696,6 +696,7 @@ struct hl_info_mac_addr;
* then the timeout is the default timeout for the specific
* ASIC
* @get_hw_state: retrieve the H/W state
+ * @nic_control: Perform NIC related operations.
* @pci_bars_map: Map PCI BARs.
* @init_iatu: Initialize the iATU unit inside the PCI controller.
* @get_mac_addr: Get list of MAC addresses.
@@ -800,6 +801,8 @@ struct hl_asic_funcs {
int (*send_cpu_message)(struct hl_device *hdev, u32 *msg,
u16 len, u32 timeout, long *result);
enum hl_device_hw_state (*get_hw_state)(struct hl_device *hdev);
+ int (*nic_control)(struct hl_device *hdev, u32 op, void *input,
+ void *output);
int (*pci_bars_map)(struct hl_device *hdev);
int (*init_iatu)(struct hl_device *hdev);
int (*get_mac_addr)(struct hl_device *hdev,
diff --git a/drivers/misc/habanalabs/common/habanalabs_ioctl.c b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
index 5db6c978415c..a0d6a9ad7882 100644
--- a/drivers/misc/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
@@ -24,6 +24,20 @@ static u32 hl_debug_struct_size[HL_DEBUG_OP_TIMESTAMP + 1] = {

};

+static u32 hl_nic_input_size[HL_NIC_OP_DESTROY_CONN + 1] = {
+ [HL_NIC_OP_ALLOC_CONN] = sizeof(struct hl_nic_alloc_conn_in),
+ [HL_NIC_OP_SET_REQ_CONN_CTX] = sizeof(struct hl_nic_req_conn_ctx_in),
+ [HL_NIC_OP_SET_RES_CONN_CTX] = sizeof(struct hl_nic_res_conn_ctx_in),
+ [HL_NIC_OP_DESTROY_CONN] = sizeof(struct hl_nic_destroy_conn_in),
+};
+
+static u32 hl_nic_output_size[HL_NIC_OP_DESTROY_CONN + 1] = {
+ [HL_NIC_OP_ALLOC_CONN] = sizeof(struct hl_nic_alloc_conn_out),
+ [HL_NIC_OP_SET_REQ_CONN_CTX] = 0,
+ [HL_NIC_OP_SET_RES_CONN_CTX] = 0,
+ [HL_NIC_OP_DESTROY_CONN] = 0,
+};
+
static int device_status_info(struct hl_device *hdev, struct hl_info_args *args)
{
struct hl_info_device_status dev_stat = {0};
@@ -545,6 +559,87 @@ static int hl_debug_ioctl(struct hl_fpriv *hpriv, void *data)
return rc;
}

+static int nic_control(struct hl_device *hdev, struct hl_nic_args *args)
+{
+ void *input = NULL, *output = NULL;
+ int rc;
+
+ if (args->input_ptr && args->input_size) {
+ input = kzalloc(hl_nic_input_size[args->op], GFP_KERNEL);
+ if (!input) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ if (copy_from_user(input, u64_to_user_ptr(args->input_ptr),
+ args->input_size)) {
+ rc = -EFAULT;
+ dev_err(hdev->dev, "failed to copy input NIC data\n");
+ goto out;
+ }
+ }
+
+ if (args->output_ptr && args->output_size) {
+ output = kzalloc(hl_nic_output_size[args->op], GFP_KERNEL);
+ if (!output) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ }
+
+ rc = hdev->asic_funcs->nic_control(hdev, args->op, input, output);
+ if (rc)
+ dev_err_ratelimited(hdev->dev,
+ "NIC control operation %d failed %d\n",
+ args->op, rc);
+
+ if (output && copy_to_user((void __user *) (uintptr_t) args->output_ptr,
+ output, args->output_size)) {
+ dev_err(hdev->dev, "copy to user failed in nic ioctl\n");
+ rc = -EFAULT;
+ goto out;
+ }
+
+out:
+ kfree(output);
+ kfree(input);
+
+ return rc;
+}
+
+static int hl_nic_ioctl(struct hl_fpriv *hpriv, void *data)
+{
+ struct hl_device *hdev = hpriv->hdev;
+ struct hl_nic_args *args = data;
+ int rc;
+
+ if (hl_device_disabled_or_in_reset(hdev)) {
+ dev_warn_ratelimited(hdev->dev,
+ "Device is %s. Can't execute NIC IOCTL\n",
+ atomic_read(&hdev->in_reset) ? "in_reset" : "disabled");
+ return -EBUSY;
+ }
+
+ switch (args->op) {
+ case HL_NIC_OP_ALLOC_CONN:
+ case HL_NIC_OP_SET_REQ_CONN_CTX:
+ case HL_NIC_OP_SET_RES_CONN_CTX:
+ case HL_NIC_OP_DESTROY_CONN:
+ args->input_size =
+ min(args->input_size, hl_nic_input_size[args->op]);
+ args->output_size =
+ min(args->output_size, hl_nic_output_size[args->op]);
+ rc = nic_control(hdev, args);
+ break;
+ default:
+ dev_err(hdev->dev, "Invalid request %d\n", args->op);
+ rc = -ENOTTY;
+ break;
+ }
+
+ return rc;
+}
+
#define HL_IOCTL_DEF(ioctl, _func) \
[_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func}

@@ -554,7 +649,8 @@ static const struct hl_ioctl_desc hl_ioctls[] = {
HL_IOCTL_DEF(HL_IOCTL_CS, hl_cs_ioctl),
HL_IOCTL_DEF(HL_IOCTL_WAIT_CS, hl_cs_wait_ioctl),
HL_IOCTL_DEF(HL_IOCTL_MEMORY, hl_mem_ioctl),
- HL_IOCTL_DEF(HL_IOCTL_DEBUG, hl_debug_ioctl)
+ HL_IOCTL_DEF(HL_IOCTL_DEBUG, hl_debug_ioctl),
+ HL_IOCTL_DEF(HL_IOCTL_NIC, hl_nic_ioctl)
};

static const struct hl_ioctl_desc hl_ioctls_control[] = {
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index d2f51497fa8e..9ad34e22f00b 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -7470,6 +7470,7 @@ static const struct hl_asic_funcs gaudi_funcs = {
.get_eeprom_data = gaudi_get_eeprom_data,
.send_cpu_message = gaudi_send_cpu_message,
.get_hw_state = gaudi_get_hw_state,
+ .nic_control = gaudi_nic_control,
.pci_bars_map = gaudi_pci_bars_map,
.init_iatu = gaudi_init_iatu,
.get_mac_addr = gaudi_nic_get_mac_addr,
diff --git a/drivers/misc/habanalabs/gaudi/gaudiP.h b/drivers/misc/habanalabs/gaudi/gaudiP.h
index 69b3656eaaeb..4143be6479fb 100644
--- a/drivers/misc/habanalabs/gaudi/gaudiP.h
+++ b/drivers/misc/habanalabs/gaudi/gaudiP.h
@@ -566,6 +566,8 @@ void gaudi_nic_stop(struct hl_device *hdev);
void gaudi_nic_ports_reopen(struct hl_device *hdev);
int gaudi_nic_get_mac_addr(struct hl_device *hdev,
struct hl_info_mac_addr *mac_addr);
+int gaudi_nic_control(struct hl_device *hdev, u32 op, void *input,
+ void *output);
void gaudi_nic_ctx_fini(struct hl_ctx *ctx);
irqreturn_t gaudi_nic_rx_irq_handler(int irq, void *arg);
irqreturn_t gaudi_nic_cq_irq_handler(int irq, void *arg);
diff --git a/drivers/misc/habanalabs/gaudi/gaudi_nic.c b/drivers/misc/habanalabs/gaudi/gaudi_nic.c
index fc4fc80eb005..ed994d25da4f 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi_nic.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi_nic.c
@@ -56,6 +56,7 @@ enum eth_pkt_status {
#define PCS_FAIL_THRESHOLD 8
#define PCS_FAULT_THRESHOLD 20
#define PCS_LINK_RETRY_MSEC 20
+#define QPC_REQ_BURST_SIZE 16

/* NIC_MAX_MTU equals 8K minus eth header */
#define NIC_MAX_MTU ((1 << 13) - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN))
@@ -70,6 +71,9 @@ enum eth_pkt_status {
#define MAC_CFG_XPCS91(addr, data) \
mac_write(gaudi_nic, i, "xpcs91", addr, data)

+static struct hl_qp dummy_qp;
+static int qp_put(struct hl_qp *qp);
+
bool disabled_or_in_reset(struct gaudi_nic_device *gaudi_nic)
{
return atomic_read(&gaudi_nic->in_reset) ||
@@ -2801,6 +2805,408 @@ int gaudi_nic_get_mac_addr(struct hl_device *hdev,
out:
return 0;
}
+
+static struct hl_qp *qp_get(struct hl_device *hdev,
+ struct gaudi_nic_device *gaudi_nic, u32 conn_id)
+{
+ struct hl_qp *qp;
+
+ mutex_lock(&gaudi_nic->idr_lock);
+ qp = idr_find(&gaudi_nic->qp_ids, conn_id);
+ if (!qp || qp == &dummy_qp) {
+ dev_err(hdev->dev,
+ "Failed to find matching QP for handle %d in port %d\n",
+ conn_id, gaudi_nic->port);
+ goto out;
+ }
+
+ kref_get(&qp->refcount);
+out:
+ mutex_unlock(&gaudi_nic->idr_lock);
+
+ return qp;
+}
+
+static void qp_do_release(struct hl_qp *qp)
+{
+ mutex_destroy(&qp->qpc_lock);
+ kfree(qp);
+}
+
+static void qp_release(struct kref *ref)
+{
+ struct hl_qp *qp = container_of(ref, struct hl_qp, refcount);
+ struct gaudi_nic_device *gaudi_nic = qp->gaudi_nic;
+ struct hl_device *hdev = gaudi_nic->hdev;
+ struct qpc_requester req_qpc = {};
+ struct qpc_responder res_qpc = {};
+ u64 req_qpc_addr, res_qpc_addr;
+ void __iomem *base_bar_addr;
+ struct gaudi_device *gaudi;
+ int i;
+
+ gaudi = hdev->asic_specific;
+ base_bar_addr = hdev->pcie_bar[HBM_BAR_ID] - gaudi->hbm_bar_cur_addr;
+
+ req_qpc_addr = REQ_QPC_ADDR(qp->port, qp->conn_id);
+ res_qpc_addr = RES_QPC_ADDR(qp->port, qp->conn_id);
+
+ REQ_QPC_SET_VALID(req_qpc, 0);
+ RES_QPC_SET_VALID(res_qpc, 0);
+
+ mutex_lock(&qp->qpc_lock);
+
+ if (qp->is_req)
+ for (i = 0 ; i < (sizeof(req_qpc) / sizeof(u64)) ; i++)
+ writeq(req_qpc.data[i], base_bar_addr +
+ (req_qpc_addr + i * 8));
+
+ if (qp->is_res)
+ for (i = 0 ; i < (sizeof(res_qpc) / sizeof(u64)) ; i++)
+ writeq(res_qpc.data[i], base_bar_addr +
+ (res_qpc_addr + i * 8));
+
+ /* Perform read to flush the writes of the connection context */
+ readq(hdev->pcie_bar[HBM_BAR_ID]);
+
+ if (qp->is_req)
+ qpc_cache_inv(gaudi_nic, true);
+ if (qp->is_res)
+ qpc_cache_inv(gaudi_nic, false);
+
+ mutex_unlock(&qp->qpc_lock);
+
+ /*
+ * No need in removing the QP ID from the IDR. This will be done once
+ * the IDR gets full. We do this lazy cleanup because we don't want to
+ * reuse a QP ID immediately after a QP was destroyed.
+ */
+ qp_do_release(qp);
+}
+
+static int qp_put(struct hl_qp *qp)
+{
+ return kref_put(&qp->refcount, qp_release);
+}
+
+/* "gaudi_nic->idr_lock" should be taken from the caller function if needed */
+static void qps_clean_dummies(struct gaudi_nic_device *gaudi_nic)
+{
+ struct hl_qp *qp;
+ int qp_id;
+
+ idr_for_each_entry(&gaudi_nic->qp_ids, qp, qp_id)
+ if (qp == &dummy_qp)
+ idr_remove(&gaudi_nic->qp_ids, qp_id);
+}
+
+static int conn_ioctl_check(struct hl_device *hdev, u32 port, u32 conn_id)
+{
+ if (port >= NIC_NUMBER_OF_PORTS) {
+ dev_err(hdev->dev, "Invalid port %d\n", port);
+ return -EINVAL;
+ }
+
+ if (!(hdev->nic_ports_mask & BIT(port))) {
+ dev_err(hdev->dev, "Port %d is disabled\n", port);
+ return -ENODEV;
+ }
+
+ if (conn_id < HL_NIC_MIN_CONN_ID || conn_id > HL_NIC_MAX_CONN_ID) {
+ dev_err(hdev->dev, "Invalid connection ID %d for port %d\n",
+ conn_id, port);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int alloc_conn(struct hl_device *hdev, struct hl_nic_alloc_conn_in *in,
+ struct hl_nic_alloc_conn_out *out)
+{
+ struct gaudi_device *gaudi = hdev->asic_specific;
+ struct gaudi_nic_device *gaudi_nic;
+ struct hl_qp *qp;
+ int id, rc;
+
+ if (!in || !out) {
+ dev_err(hdev->dev,
+ "Missing parameters to allocate a NIC context\n");
+ return -EINVAL;
+ }
+
+ rc = conn_ioctl_check(hdev, in->port, HL_NIC_MIN_CONN_ID);
+ if (rc)
+ return rc;
+
+ qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp)
+ return -ENOMEM;
+
+ gaudi_nic = &gaudi->nic_devices[in->port];
+ mutex_init(&qp->qpc_lock);
+ kref_init(&qp->refcount);
+ qp->gaudi_nic = gaudi_nic;
+ qp->port = in->port;
+
+ /* TODO: handle local/remote keys */
+
+ mutex_lock(&gaudi_nic->idr_lock);
+ id = idr_alloc(&gaudi_nic->qp_ids, qp, HL_NIC_MIN_CONN_ID,
+ HL_NIC_MAX_CONN_ID + 1, GFP_KERNEL);
+
+ if (id < 0) {
+ /* Try again after removing the dummy ids */
+ qps_clean_dummies(gaudi_nic);
+ id = idr_alloc(&gaudi_nic->qp_ids, qp, HL_NIC_MIN_CONN_ID,
+ HL_NIC_MAX_CONN_ID + 1, GFP_KERNEL);
+ }
+
+ qp->conn_id = id;
+ mutex_unlock(&gaudi_nic->idr_lock);
+
+ if (id < 0) {
+ qp_do_release(qp);
+ return id;
+ }
+
+ dev_dbg(hdev->dev, "Allocating connection id %d in port %d",
+ id, qp->port);
+
+ out->conn_id = id;
+
+ return 0;
+}
+
+static int set_req_conn_ctx(struct hl_device *hdev,
+ struct hl_nic_req_conn_ctx_in *in)
+{
+ struct gaudi_device *gaudi = hdev->asic_specific;
+ struct gaudi_nic_device *gaudi_nic;
+ struct qpc_requester req_qpc = {};
+ struct hl_qp *qp;
+ u64 req_qpc_addr;
+ int i, rc;
+
+ if (!in) {
+ dev_err(hdev->dev,
+ "Missing parameters to set a requester context\n");
+ return -EINVAL;
+ }
+
+ rc = conn_ioctl_check(hdev, in->port, in->conn_id);
+ if (rc)
+ return rc;
+
+ gaudi_nic = &gaudi->nic_devices[in->port];
+
+ qp = qp_get(hdev, gaudi_nic, in->conn_id);
+ if (!qp)
+ return -EINVAL;
+
+ req_qpc_addr = REQ_QPC_ADDR(in->port, in->conn_id);
+ REQ_QPC_SET_DST_QP(req_qpc, in->dst_conn_id);
+ REQ_QPC_SET_PORT(req_qpc, 0);
+ REQ_QPC_SET_PRIORITY(req_qpc, in->priority);
+ REQ_QPC_SET_RKEY(req_qpc, qp->remote_key);
+ REQ_QPC_SET_DST_IP(req_qpc, in->dst_ip_addr);
+ REQ_QPC_SET_SRC_IP(req_qpc, in->src_ip_addr);
+ REQ_QPC_SET_DST_MAC_31_0(req_qpc, *(u32 *) in->dst_mac_addr);
+ REQ_QPC_SET_DST_MAC_47_32(req_qpc, *(u16 *) (in->dst_mac_addr + 4));
+ REQ_QPC_SET_SQ_NUM(req_qpc, in->sq_number);
+ REQ_QPC_SET_TM_GRANULARITY(req_qpc, in->timer_granularity);
+ REQ_QPC_SET_SOB_EN(req_qpc, in->enable_sob);
+ REQ_QPC_SET_TRANSPORT_SERVICE(req_qpc, TS_RC);
+ REQ_QPC_SET_BURST_SIZE(req_qpc, QPC_REQ_BURST_SIZE);
+ REQ_QPC_SET_LAST_IDX(req_qpc, in->last_index);
+ REQ_QPC_SET_WQ_BASE_ADDR(req_qpc, in->conn_id);
+ REQ_QPC_SET_SWQ_GRANULARITY(req_qpc, in->swq_granularity);
+ REQ_QPC_SET_VALID(req_qpc, 1);
+
+ mutex_lock(&qp->qpc_lock);
+
+ for (i = 0 ; i < (sizeof(req_qpc) / sizeof(u64)) ; i++)
+ writeq(req_qpc.data[i], hdev->pcie_bar[HBM_BAR_ID] +
+ ((req_qpc_addr + i * 8) - gaudi->hbm_bar_cur_addr));
+
+ /* Perform read to flush the writes of the connection context */
+ readq(hdev->pcie_bar[HBM_BAR_ID]);
+
+ qp->is_req = true;
+ qpc_cache_inv(gaudi_nic, true);
+
+ mutex_unlock(&qp->qpc_lock);
+
+ qp_put(qp);
+
+ return 0;
+}
+
+static int set_res_conn_ctx(struct hl_device *hdev,
+ struct hl_nic_res_conn_ctx_in *in)
+{
+ struct gaudi_device *gaudi = hdev->asic_specific;
+ struct gaudi_nic_device *gaudi_nic;
+ struct qpc_responder res_qpc = {};
+ struct hl_qp *qp;
+ u64 res_qpc_addr;
+ int i, rc;
+
+ if (!in) {
+ dev_err(hdev->dev,
+ "Missing parameters to set a responder context\n");
+ return -EINVAL;
+ }
+
+ rc = conn_ioctl_check(hdev, in->port, in->conn_id);
+ if (rc)
+ return rc;
+
+ gaudi_nic = &gaudi->nic_devices[in->port];
+
+ qp = qp_get(hdev, gaudi_nic, in->conn_id);
+ if (!qp)
+ return -EINVAL;
+
+ res_qpc_addr = RES_QPC_ADDR(in->port, in->conn_id);
+ RES_QPC_SET_DST_QP(res_qpc, in->dst_conn_id);
+ RES_QPC_SET_PORT(res_qpc, 0);
+ RES_QPC_SET_PRIORITY(res_qpc, in->priority);
+ RES_QPC_SET_SQ_NUM(res_qpc, in->sq_number);
+ RES_QPC_SET_LKEY(res_qpc, qp->local_key);
+ RES_QPC_SET_DST_IP(res_qpc, in->dst_ip_addr);
+ RES_QPC_SET_SRC_IP(res_qpc, in->src_ip_addr);
+ RES_QPC_SET_DST_MAC_31_0(res_qpc, *(u32 *) in->dst_mac_addr);
+ RES_QPC_SET_DST_MAC_47_32(res_qpc, *(u16 *) (in->dst_mac_addr + 4));
+ RES_QPC_SET_TRANSPORT_SERVICE(res_qpc, TS_RC);
+ RES_QPC_SET_LOG_BUF_SIZE_MASK(res_qpc, 0);
+ RES_QPC_SET_SOB_EN(res_qpc, in->enable_sob);
+ RES_QPC_SET_VALID(res_qpc, 1);
+
+ mutex_lock(&qp->qpc_lock);
+
+ for (i = 0 ; i < (sizeof(res_qpc) / sizeof(u64)) ; i++)
+ writeq(res_qpc.data[i], hdev->pcie_bar[HBM_BAR_ID] +
+ ((res_qpc_addr + i * 8) - gaudi->hbm_bar_cur_addr));
+
+ /* Perform read to flush the writes of the connection context */
+ readq(hdev->pcie_bar[HBM_BAR_ID]);
+
+ qp->is_res = true;
+ qpc_cache_inv(gaudi_nic, false);
+
+ mutex_unlock(&qp->qpc_lock);
+
+ qp_put(qp);
+
+ return 0;
+}
+
+static int destroy_conn(struct hl_device *hdev,
+ struct hl_nic_destroy_conn_in *in)
+{
+ struct gaudi_device *gaudi = hdev->asic_specific;
+ struct gaudi_nic_device *gaudi_nic;
+ struct hl_qp *qp;
+ int rc;
+
+ if (!in) {
+ dev_err(hdev->dev,
+ "Missing parameters to destroy a NIC context\n");
+ return -EINVAL;
+ }
+
+ rc = conn_ioctl_check(hdev, in->port, in->conn_id);
+ if (rc)
+ return rc;
+
+ gaudi_nic = &gaudi->nic_devices[in->port];
+
+ /* The QP pointer is replaced with the dummy QP to prevent other threads
+ * from using the QP. The ID is kept allocated at this stage so the QP
+ * context can be safely modified. qp_put() is called right afterwards.
+ */
+ mutex_lock(&gaudi_nic->idr_lock);
+ qp = idr_replace(&gaudi_nic->qp_ids, &dummy_qp, in->conn_id);
+ mutex_unlock(&gaudi_nic->idr_lock);
+
+ if (IS_ERR(qp))
+ return PTR_ERR(qp);
+
+ qp_put(qp);
+
+ return 0;
+}
+
+int gaudi_nic_control(struct hl_device *hdev, u32 op, void *input, void *output)
+{
+ struct gaudi_device *gaudi = hdev->asic_specific;
+ int rc;
+
+ if (!(gaudi->hw_cap_initialized & HW_CAP_NIC_DRV))
+ return -EFAULT;
+
+ switch (op) {
+ case HL_NIC_OP_ALLOC_CONN:
+ rc = alloc_conn(hdev, input, output);
+ break;
+ case HL_NIC_OP_SET_REQ_CONN_CTX:
+ rc = set_req_conn_ctx(hdev, input);
+ break;
+ case HL_NIC_OP_SET_RES_CONN_CTX:
+ rc = set_res_conn_ctx(hdev, input);
+ break;
+ case HL_NIC_OP_DESTROY_CONN:
+ rc = destroy_conn(hdev, input);
+ break;
+ default:
+ dev_err(hdev->dev, "Invalid NIC control request %d\n", op);
+ return -ENOTTY;
+ }
+
+ return rc;
+}
+
+static void qps_destroy(struct hl_device *hdev)
+{
+ struct gaudi_device *gaudi = hdev->asic_specific;
+ struct gaudi_nic_device *gaudi_nic;
+ struct hl_qp *qp;
+ int qp_id, i;
+
+ for (i = 0 ; i < NIC_NUMBER_OF_PORTS ; i++) {
+ if (!(hdev->nic_ports_mask & BIT(i)))
+ continue;
+
+ gaudi_nic = &gaudi->nic_devices[i];
+
+ /*
+ * No need to acquire "gaudi_nic->idr_lock", as qps_destroy() is
+ * only called when a context is closed, and in Gaudi we have a
+ * single context.
+ */
+
+ qps_clean_dummies(gaudi_nic);
+
+ idr_for_each_entry(&gaudi_nic->qp_ids, qp, qp_id) {
+ idr_remove(&gaudi_nic->qp_ids, qp_id);
+ if (qp_put(qp) != 1)
+ dev_err(hdev->dev,
+ "QP %d of port %d is still alive\n",
+ qp->conn_id, qp->port);
+ }
+ }
+}
+
void gaudi_nic_ctx_fini(struct hl_ctx *ctx)
{
+ struct gaudi_device *gaudi = ctx->hdev->asic_specific;
+ struct hl_device *hdev = ctx->hdev;
+
+ if (!(gaudi->hw_cap_initialized & HW_CAP_NIC_DRV))
+ return;
+
+ qps_destroy(hdev);
+ /* wait for the NIC to digest the invalid QPs */
+ msleep(20);
}
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 75e3b3bac47c..13b2bfac2b7a 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -5269,6 +5269,14 @@ static enum hl_device_hw_state goya_get_hw_state(struct hl_device *hdev)
return RREG32(mmHW_STATE);
}

+static int goya_nic_control(struct hl_device *hdev, u32 op, void *input,
+ void *output)
+{
+ dev_err_ratelimited(hdev->dev,
+ "NIC operations cannot be performed on Goya\n");
+ return -ENXIO;
+}
+
static int goya_get_mac_addr(struct hl_device *hdev,
struct hl_info_mac_addr *mac_addr)
{
@@ -5394,6 +5402,7 @@ static const struct hl_asic_funcs goya_funcs = {
.get_eeprom_data = goya_get_eeprom_data,
.send_cpu_message = goya_send_cpu_message,
.get_hw_state = goya_get_hw_state,
+ .nic_control = goya_nic_control,
.pci_bars_map = goya_pci_bars_map,
.init_iatu = goya_init_iatu,
.get_mac_addr = goya_get_mac_addr,
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index 4c545ae8b6df..dbee6a16b952 100644
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -852,6 +852,116 @@ struct hl_debug_args {
#define HL_NIC_MIN_CONN_ID 1
#define HL_NIC_MAX_CONN_ID 1023

+struct hl_nic_alloc_conn_in {
+ /* NIC port ID */
+ __u32 port;
+ __u32 pad;
+};
+
+struct hl_nic_alloc_conn_out {
+ /* Connection ID */
+ __u32 conn_id;
+ __u32 pad;
+};
+
+struct hl_nic_req_conn_ctx_in {
+ /* Source IP address */
+ __u32 src_ip_addr;
+ /* Destination IP address */
+ __u32 dst_ip_addr;
+ /* Destination connection ID */
+ __u32 dst_conn_id;
+ /* Burst size [1..(2^22)-1 or 0 to disable] */
+ __u32 burst_size;
+ /* Index of last entry [2..(2^22)-1] */
+ __u32 last_index;
+ /* NIC port ID */
+ __u32 port;
+ /* Connection ID */
+ __u32 conn_id;
+ /* Destination MAC address */
+ __u8 dst_mac_addr[ETH_ALEN];
+ /* SQ number */
+ __u8 sq_number;
+ /* Connection priority [0..3] */
+ __u8 priority;
+ /* Enable/disable SOB */
+ __u8 enable_sob;
+ /* Timer granularity [0..127]*/
+ __u8 timer_granularity;
+ /* SWQ granularity [0 for 64B or 1 for 32B] */
+ __u8 swq_granularity;
+ /* Work queue type [1..3] */
+ __u8 wq_type;
+ /* Version type in remote side [0..1] */
+ __u8 version;
+ /* Completion queue number */
+ __u8 cq_number;
+ /* Remote Work queue log size [2^QPC] Rendezvous */
+ __u8 wq_remote_log_size;
+ __u8 pad;
+};
+
+struct hl_nic_res_conn_ctx_in {
+ /* Source IP address */
+ __u32 src_ip_addr;
+ /* Destination IP address */
+ __u32 dst_ip_addr;
+ /* Destination connection ID */
+ __u32 dst_conn_id;
+ /* NIC port ID */
+ __u32 port;
+ /* Connection ID */
+ __u32 conn_id;
+ /* Destination MAC address */
+ __u8 dst_mac_addr[ETH_ALEN];
+ /* Connection priority [0..3] */
+ __u8 priority;
+ /* SQ number */
+ __u8 sq_number;
+ /* Enable/disable SOB */
+ __u8 enable_sob;
+ /* Work queue granularity */
+ __u8 wq_peer_granularity;
+ /* Completion queue number */
+ __u8 cq_number;
+ /* Version type in remote side [0..1] */
+ __u8 version;
+ /* Connection peer */
+ __u32 conn_peer;
+};
+
+struct hl_nic_destroy_conn_in {
+ /* NIC port ID */
+ __u32 port;
+ /* Connection ID */
+ __u32 conn_id;
+};
+
+/* Opcode to allocate connection ID */
+#define HL_NIC_OP_ALLOC_CONN 0
+/* Opcode to set up a requester connection context */
+#define HL_NIC_OP_SET_REQ_CONN_CTX 1
+/* Opcode to set up a responder connection context */
+#define HL_NIC_OP_SET_RES_CONN_CTX 2
+/* Opcode to destroy a connection */
+#define HL_NIC_OP_DESTROY_CONN 3
+
+struct hl_nic_args {
+ /* Pointer to user input structure (relevant to specific opcodes) */
+ __u64 input_ptr;
+ /* Pointer to user output structure (relevant to specific opcodes) */
+ __u64 output_ptr;
+ /* Size of user input structure */
+ __u32 input_size;
+ /* Size of user output structure */
+ __u32 output_size;
+ /* Context ID - Currently not in use */
+ __u32 ctx_id;
+ /* HL_NIC_OP_* */
+ __u32 op;
+};
+
/*
* Various information operations such as:
* - H/W IP information
@@ -1017,7 +1127,24 @@ struct hl_debug_args {
#define HL_IOCTL_DEBUG \
_IOWR('H', 0x06, struct hl_debug_args)

+/*
+ * NIC
+ *
+ * This IOCTL allows the user to manage and configure the device's NIC ports.
+ * The following operations are available:
+ * - Allocate connection ID
+ * - Set up a requester connection context
+ * - Set up a responder connection context
+ * - Destroy a connection
+ *
+ * For all operations, the user should provide a pointer to an input structure
+ * with the context parameters. Some of the operations also require a pointer to
+ * an output structure for result/status.
+ *
+ */
+#define HL_IOCTL_NIC _IOWR('H', 0x07, struct hl_nic_args)
+
#define HL_COMMAND_START 0x01
-#define HL_COMMAND_END 0x07
+#define HL_COMMAND_END 0x08

#endif /* HABANALABS_H_ */
--
2.17.1
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